A 15.0 kilogram kid on a 3.00 meter long swing is released from rest when the ropes of the swing create an angle of 33.0 degree with the vertical.
(a) Ignore friction; calculate the kid's speed at the lowest position.
m/s
(b) If the speed of the kid at the lowest position is 2.70 m/s, find what is the mechanical energy lost due to friction?
J